Arm sling



FIG. 1 is a front view of an arm sling in a folded configuration, showing my design;

FIG. 2 is a rear view thereof;

FIG. 3 is a front view of the arm sling in an open configuration;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof;

FIG. 8 is a top view thereof; and,

FIG. 9 is a perspective view of the arm sling in a cylindrical configuration.

The broken line showing in the Figures shows portions of the arm sling and forms no part of the claimed design. The arm sling is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claim. 

CLAIM The ornamental design for an arm sling, as shown and described. 